Re: [tip:core/locking] x86/smp: Move waiting on contended ticket lockout of line

From: Linus Torvalds
Date: Wed Feb 27 2013 - 23:49:12 EST

On Wed, Feb 27, 2013 at 8:06 PM, Davidlohr Bueso <davidlohr.bueso@xxxxxx> wrote:
> The attached file shows how the amount of sys time used by the ipc lock
> for a 4 and 8 socket box.

I have to say, even with the improvements, that looks pretty
disgusting. It really makes me wonder if that thing couldn't be done
better some way. Is it the SysV semaphores that this all ends up
using, or what?

That said, I think the IPC layer is just about the perfect candidate
for things like this, because I'm afraid that nobody is ever going to
fix it.

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at